package demo03;

public class BankPay implements Pay{
    double m =150;

    @Override
    public void pay(double money) {
        if (m>=money){
            System.out.println("你消费的金额为"+money);
            m = m - money;
            System.out.println("余额"+m);
        }
        else {
            System.out.println("你的余额不足");
        }
    }
}
